function [ status ] = mx_eyelink_broadcast_open( )
%MX_EYELINK_BROADCAST_OPEN Allows a third computer to listen in on a session 
% between the eye tracker and a controlling remote machine. This allows it to
% receive data during recording and playback, and to monitor the eye tracker 
% mode. The local computer will not be able to send commands to the eye tracker, 
% but may be able to send messages or request the tracker time.
%
%Remarks:
%May not function properly, if there are more than one Ethernet cards installed.
%
% Returns:
% 0 if successful.
% -200 if link could not be established.
% -201 if tracker did not respond.
% -203 if the versions of the EyeLink library and tracker are incompatible.
%
%----------------------------------------------------------------------------
% Copyright Eduardo Aponte 2013
% aponteeduardo@gmail.com